Mill-btjsh



L. DULANEY. Mill Spindle.,

Patented- Oct; 24, 1854.

UNITED STATES PATENT OFFICE.

GEORGE L. DULANEY, OF LONG MEADOW, VIRGINIA.

MILL-BUSH.

Specification of Letters Patent No. 11,828, dated October 24, 1854.

To all whom it may concern Be it known that I, GEORGE L. DULANEY, of Long Meadow, in the county of Page and State of Virginia, have invented certain new and useful Improvements in Mill-Bushes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification.

The nature of my improvement consists in using a conical spindle working in a corresponding socket by which a perfect run of the spindle and stone is obtained and by the application of my invention viz, the device by which thewear of said cone and socket is taken up by means of draw bolts automatically acted on by nuts moved with springs on the lower end of said bolts.

The cone is slipped on the ordinary cylindrical spindle, being secured thereto with a feather entering a groove in the cone, the obect of this connection 1S to admit of raising or lowering the stone, in grinding coarse or fine. The draw bolts above adverted to have the property of keeping the socket down when worn.

In the accompanying drawings A, repre sents a square box of metal inserted in the eye of the lower stone; B the bottom thereof; C the cylindrical spindle, carrying the cone C thereon.

D is a conical socket corresponding with C, furnished with guides a or entering the corners of box A.

E E are the draw bolts for taking up the wear of the cone and socket; the upper ends of these bolts have a circular head 6, having teeth upon the periphery into which the sprin pawl, f, drops.

9, g, are nuts turning on screw threads on the lower ends of the bolts E E.

F F are helical springs secured at one end to fixed studs h, see Fig. 3, a reverse view of the box, and said springs embrace and turn the nuts by their extension.

The lower collar of the cone rests and turns on the bottom plate B of the box and does not rise or fall in moving the stone; the socket and the flanged head thereof sink sufliciently in the box A to allow of a dust cap being secured over them; by means of guides at a, a a connected with the flange of D, D, the socket is steadied and also prevented from turning, and any wear of socket or cone is taken up by the turning of the or cone is taken up by the turning of the nut g, by the automatic action of the spring F.

The lower end of the bolts E are made square, and when from the great wear of the socket and cone it becomes necessary to wind up the spring F a forked handle is placed over the end of the bolt for the turn ing of the bolt and nut, the ratchet formed head of the bolt and pawl f, admitting this movement of the bolt; the bottom of the bush box A being exposed below the mill floor readily admits the application of this forked key in taking up the slack of the spring when the socket and cone are considerably worn.

It is thus by means of the turning ofthe nuts by the springs that without other aid all slack or wear of the socket is taken up, and as a consequence it is kept tight and runs close, and all tendency to vibration of the spindle prevented and its vertical position is always preserved, thus preventing a tendency existing of wearing the spindle irregularly. The upper stone or runner is balanced upon the spindle by the ordinary ballance sind, or socket iron.

Having described my improvement what I claim as my invention and desire to secure by Letters Patent is- The use of springs F F actuating the nuts, 9, g, on draw bolts E E for the purposes set forth in the foregoing specification.

In testimony whereof I have hereunto signed my name before two subscribing witnesses.

GEORGE L. DULANEY. lVitnesses:

J OHN F. CLARK, SAML. GRUBB. 

